Networking & IT Tools

Wi-Fi dBm to Percent Calculator

Enter a Wi-Fi signal strength in dBm to convert it into an approximate signal quality percentage.

60%

Good signal

Uses the common linear approximation quality% = 2 × (dBm + 100), clamped to 0-100%, treating -50 dBm as 100% and -100 dBm as 0% — the same scale several Wi-Fi utilities use to turn dBm readings into a signal bar.

How to use this tool

  1. 1Enter your signal strength reading in dBm (a negative number).
  2. 2See the approximate signal quality percentage and rating.

Frequently asked questions

Is this conversion exact?+

No — dBm is a logarithmic power measurement while percentage is a linear approximation many Wi-Fi utilities use for a simple display; treat the percentage as a rough guide, not a precise measurement.

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